Locomotive-boiler



A. H. WILLETT.

LOCOMOTIVE BOILER FURNACE. APPLICATION FILED SEPT. 28, 191 1.

1,306.1 33. Patented June 10, 1919.

I 2 SHEET$SHEET l- 115w A. H. WILLETTL LOCOMOTIVE BOILER FURNACE. V APPLICATION HLEU'SEPT. Z8 19l?- 1,396, 1 33. Patented June 10, 1919.

2 SHEETS SHEET 2.

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ALFRED H. WILLETT, OF wEST NEvV YORK, NEW JERSEY, ASSIGNOR TO AMERICAN ARCH COMPANY, OF NEW YORK, N. Y., A CORYORATION OF DELAWARE.

LOCOllIlIOTIVE-IBOILER FURNACE.

incense.-

Specification of Letters Patent. t t Ju 14 1319;

Application filed September 28, 1917. Serial No. 193,670.

To all whom it may concern:

Be it known that I, ALFRED H. lYILLn'r'r, a citizen of the United States, and a resident of West New York, county of Hudson, and State of New Jersey, have invented certain new\ and useful Improvements in L0comotive-lloiler Furnaces, of which the following is a specification.

My invention relates generally to improvements in locomotive boiler' furnaces,

and relates more particularly to lll'lPIOYG- ments in locomotive boiler furnaces of the type provided with a cross wall of refractory material, generally known as aGaines" wall. and a co-acting tube supported fire arch or baflie.

The general object of my-invention is to provide a fire box of this type, which shall be of low cost; efficient in operation; and

which shall be so constructed that it will.

withstand the severely disruptive forces to which it has been subjected in use, without premature deterioration.

A further object of my invention is to pro vide a locomotive boiler of the type referred to, in which the various parts thereof shall be so formed and positioned that uniform durability of the whole may be secured to the end of the life of the fire box, and that failures due to premature breaking down of part of the structure may be obviated.

llly invention consists generally in the form. construction. arrangement, and coiiperation of the parts whereby the above named objects, together with others which will appear hereinafter, are attainable; and my invention will be more readily understood by the accompanying d -awings, which illustrate the form of my invention, which I consider the best at the present time.

In said drawings:

Figure 1 is a central, vertical, longitudinal. sectional view of a locomotive boiler furnace embodying my invention.

Fig. 2 is a vertical sectional view substantially on the line 2-2 of Fig. 1, but omitting the grate. V

Fig. 3 is a fragmentary plan view of a portion of the fire box directly over the cross wall.

Fig. 4 is a plan view of one of the mom- I bers of the fire arch.

Fig. 5 is a sectional view substantially on the line 5-5 offFig. 4.

Fig. (5 is a side elevation of the member shown 1n Figs. l and 5.

Fig. T15 a rear elevatlon of one of the members of the fire arch that cooperates with the members shown in Figs. 4, 5 and (3. Fig. 8 is a plan view of the member of Fig-7; and

Fig. 9 is a sectional view substantially on the line 99 of F ig. 8. As stated in the opening of the specification, the present invention relates to improvements in locomotive boiler furnaces of the type equipped with a cross wall and a tube supported arch. These walls and arches are usually built of fire brick, which, for 'arious reasons. is the most desirable material. These walls and arches in practice, due to the shaking, jarring and swaying movement of the locomotive, are subjected to very severe forces tending to disrupt the parts. The'fire arch or baffle supporting tubes, which are inclined, and the lower portion of the arch rests upon. the upper part of the cross wall. Be -ause of the jarring, shaking and swaying movement of the locomotive, the fire arch tends to move downward along the incdued tubes, and as a result often severs or shears the upper part of the cross wall, and thereafter may slide downward until it butts the flue sheet of the fire box. lVhen such a failure occurs, it not only destroys the brick or bricks severed, but it also has a very disruptive and detrimental effect on the rest of the arch parts, due to the.

resultant abnormal movement of the various members of the arch.

As will be better understood when the detailed description of the parts is given, I correct and overcome this very serious defect in a very simple but efiicient manner to-wit: by so forming, positioning and embodying inetallic members in the fire wall and arch construction that the forces tending to sever or shear the upper part of the cross wall are transmitted to the circulation tubes by the metallic members, which at the same time are so protected to be unaffected by the intense heat of the fire box. Furthermore, my construction is such that no changes in approved fire box construction of the type referred to are required.

Referring now to the drawings:

1 is a locomotive boiler fire box and com prises a fine sheet 2 at its forward end, a

all is mounted on rem sheet. 3, provided with a fuel door or opening, l crown sheet, 5; and side sheets 6. The fire box is provided with a grate, 7, of usual construction, but the space occupied by the grate less than the total length of the fire box. A refractory cross well, 8, 13

provided in the forward end of the fire box,

the object of which together with. arch 9, is to prevent the direct flow of the gases of combustion from the grate to the fines. The cross wall 8 is supported on :tbridge or spun member ill; is composed of several rows of refractory bricks ll; and rises it considerable distance vertically in the lire box. This wall is preferably provided with it plurality of air conduits, '12, opening at their upper ends, 13, into the fire box. It is not thought necessary to describe the lower part of; the cross vvull, 8, and its supportinginenrbersin detail, since this of the usual construction,

The arch, 9, extends rearward and upward through the be); from the upper part of the cross wall, 8, and for the pur pose of supporting this arch in position a plurality of spaced water circuhtting or arc-h supporting tubes, 1 -1, are provided. These tubes as shown extend between the front and rear water legs, 15 and 16, being curved to enter the water legs at su-bstsn tially right angles thereto, thus providing a curved portion 1?, adjacent the upper pert of the cross wall, 8. In fact, It purposely position the wall respect to the curved port-ions, 17, of the arch supporting tubes to the end that the upper part of the cross well may engage the under portions or the tubes. The arch 9, us will be seen, com prises a, plurality of rows of bricks, 18,

which rest upon and extend between udjzv" cent arch tubes and between the side tubes and the side sheets. Special side bricks, 19,

are provided to ecconnmidnte themselves to the varying distances between the tube and the side sheet, it is obvious that this arch or buiiie wall, 9, occupying 21. position upon the inclined arch tubes, 14, tends to slide downwardly along the tubes, which action is u-u mcnted bv the shakin and 'errin of h 1/ I, g

the locomotive in use. The bricks, 11, of cross \vull, and the various bricks of arch 9, are composed of refractory fire brick, which are best adapted to withstand the intense lieutevolved in the fire box, but which are not well adapted to withstand a sheering action.

There an enormous force exerted on the top of the cross wall by the shutting downward inclined lire urchgil, which tends to, and has heretofore in practice, frequently severed or sheared. the top of cross wall 8, and permitted the entire arch 9 to slide downwardly until it engugecl the flue sheet with the detrimental .defects before referred to. I overcome this serious defect heretofore prevalent in furnaces of this type, by pro the member comprises n base portion, 21,

side portions, 22, and back portion, 23. The side portions, 22, extend upward from the bottom portion, '21, a. considerable distance, and the back portion, 23, rises still higher than the side portions, and the side portions join the bottom portion in this instance by means of beveled faces, 24-. In this menncr u recess is formed of such shape that it receives and nicely embraces the special brick, 25, as shown best in F 7 8, and 9. The member, 20, is composed-elf metal and it will be noted wedges under the arch sup porting tubes, 14-, thut is to say, the inclined curved side fuces QS, co-act with the under portion of theurch tubes. The special brick,

25, fitting into the metallic member, 20, also has side portions, 27, which extend under the arch tubes behind the metallic member, 20, protecting inenrlrer 20 from impingement of furnnceliu-mes. Thus it will be seen that. the pressure or force of the arch tending to sever the top of the cross well, 8,

istrunsniitted directly to the metallic meina ber, 20, which in turn abuts directly uguinst the. arch tubes, 1%. It is impossible, therefore, to sever the top portion of the cross well. and it result the cross Wall. and arch continue in proper operative position during with the vertical,conduits us is shown in the druwin fi. Of.COlllSQ, if the vertical air ducts are dispensed with, the co-acting recesses of members 20 11nd25 also may be omitted.

It should be noted that the metallic member, 20, is completely protected from direct impingementot the fuel gases, and is practicully surrounded by refractor 7 material of the bricks, being thereby protected from those intense temperatures, which would quickly destroy it metallic member.

In this munucr a tire box construction is provided in which the various parts so coact that an ellicient, durable and easily maintained arch and cross wall are provided, and in which failures due to severing of the upper portion of the cross wall are entirely prevented.

I claim:

1. In e'locomotive boiler furnace, a plurality of inclined arch tubes, at cross Wall, comprising at body portion formed of fire brie and it top portion formed of a pinrality of metallic members, a fire arch on said inclined tubes, and fire bricks i-nterposed between the metallic top members and the fire arch. said metallic members contacting with the arch tubes and receiving the thrust of the arch.

2. In a locomotive boiler furnace, a plurality ot inclined arch tubes, across Wall provided with a plu ality of metallic top members, a fire arch on i said arch tubes, and the bricks interposed bet-ween the metallic members and the tire arch, the metallic members and the interposed bricks contacting with the arch tubes and the metallic members receiving the thrust of the arch.

3. In a locomotive boiler furnace, arch tubes a the arch on said tubes, a cross Wall having a'metallic top portion provided with a recess, and a fire brick interposed be tween the fire arch and the metallic portion adapted to fit into said recess, the tire brick and the metallic portion contacting with the arch tubes and the metallic portion receiving the thrust of the arch.

l. In a locomotive boiler furnace, a plurality of inclined arch tubes each having a bent portion, a fire arch supported on the tubes above said bent portions, a cross Wall formedwith a pluralityiof metallic top members, said metallic members contacting with inclinedthe arch tubes at substantially the point Where the bends occur, and having recesses therein. and fire bricks interposed between thearch and the metallic members fitting into the recesses and adapted to transmit the downward thrust of the tire arch to the metallic members.

5. In a locomotive boiler furnace, an in clined fire arch, a cross Wall provided with a metallic top member adapted to receive the dmvnward thrust of the arch, said metallic member being protected at least on the fire-bed side thereof from combustion action,

6. Ina locomotive boiler furnace, a plurality of inclined arch tubes, :1 fire arch supported onsaid tubes, a cross well formed with a pluralit x of metallic top members, and fire bricks interfitting With said metallic members and adapted to transmit the down- Ward thrust of the fire arch to the metallic members,'said metallic members and bricks contacting with the arch tubes, the cross well being formed with spaced air conduits and the i'netallic members and the interlitting bricks being formed With openings comnmnicating with said air conduits.

In testimony whereof, I have hereuntoset my hand this 6th day of September, 1917.

ALFRED H. VVILLETT. 

